摘要
在降雨天气,当空气中的水滴高速撞击到具有一定粗糙度的风力机叶片表面涂层时,不规则的起伏结构会改变涂层材料的响应特性。文章采用光滑粒子流体动力学(SPH)方法对单个水滴高速撞击不同粗糙度的风力机叶片环氧树脂涂层进行了计算,分析表面粗糙度对环氧树脂涂层材料应力、应变的影响。结果表明:在粗糙的涂层表面上,尽管水锤效应会产生较高的接触力和有效应力,但水滴的横向喷射才是导致材料塑性变形的主要因素;粗糙涂层表面上的塑性应变主要发生在不规则起伏结构的凹陷部位;随着涂层表面粗糙度的增大,水滴横向喷射产生的横向力作用在涂层表面的起伏结构上,会显著改变材料的塑性应变模式,使塑性应变值和塑性变形区域扩大。
In rainfall weather,when water droplets in the air impact the surface coating of wind turbine blades with certain roughness at high velocity,the irregular undulation structure can change the response characteristics of the coating material.The smooth particle hydrodynamics(SPH)method is used to calculate the high-velocity impact of a single water droplet on the epoxy coating of a wind turbine blade with different roughness and to analyze the effect of surface roughness on the stress-strain of the epoxy coating material.The results show that:On the rough coating surface,although the water hammer effect produces high contact force and effective stress,the transverse jetting of the water droplet is the main factor leading to the plastic deformation of the material;the plastic strain on the rough coating surface mainly occurs in the depressed part of the irregular undulating structure;with the increase of the roughness of the coating surface,the transverse force produced by the transverse jetting of the droplet acts on the undulating structure of the coating surface,which will significantly change the plastic strain pattern of the material,and expand the plastic strain value and plastic deformation region.
作者
周文平
张东友
杨茂立
Zhou Wenping;Zhang Dongyou;Yang Maoli(School of Physics and Electrical Engineering,Liupanshui Normal University,Liupanshui 553004,China;School of Mechanical Engineering,Dalian University,Dalian 116622,China)
出处
《可再生能源》
北大核心
2025年第6期780-785,共6页
Renewable Energy Resources
基金
六盘水市科技发展项目(52020-2023-0-2-16)
六盘水师范学院科学研究培育项目(LPSSY2023KJYBPY12)。
关键词
风力机叶片
涂层
水滴
表面粗糙度
高速撞击
wind turbine blade
coating
water droplet
surface roughness
high-velocity impact
作者简介
周文平(1982-),男,博士,副教授,研究方向为流体机械及计算流体力学。E-mail:wenpz@sina.com。
